HOW MUCH WE HAVE FORGOTTEN?--------FROM CLASS IX NCERT BOOK

Q.Who discovered canal rays ?

a.J.J. Thomson

b.E.Rutherford

c.E.Goldstein

d.Neils Bohr

ANS.----c

Q.What is canal rays?

a.positively charged radiations in a gas discharge

b. negatively charged radiations in a gas discharge

c. electrically neutral  radiations in a gas discharge

d.none of the above

ANS.----a